Struct HistogramBuckets 

pub struct HistogramBuckets { /* private fields */ }

Configurable histogram bucket boundaries with statistical helpers.

Implementations

impl HistogramBuckets

pub fn new(boundaries: Vec<f64>) -> Self

Create buckets from explicit sorted upper bounds.

pub fn latency_ms() -> Self

Standard latency buckets in milliseconds: 1, 5, 10, 25, 50, 100, 250, 500, 1000, 5000.

pub fn exponential(start: f64, factor: f64, count: usize) -> Self

Exponential buckets: start * factor^i for i in 0..count.

pub fn observe(&mut self, value: f64)

Record an observed value.

pub fn percentile(&self, p: f64) -> f64

Estimate the p-th percentile (0.0–1.0) via linear interpolation.

pub fn mean(&self) -> f64

Arithmetic mean of all observations.

pub fn std_dev(&self) -> f64

Population standard deviation of all observations.

pub fn count(&self) -> u64

Total count of observations.

pub fn sum(&self) -> f64

Sum of all observations.

pub fn bucket_pairs(&self) -> Vec<(f64, u64)>

Returns (upper_bound, cumulative_count) pairs for Prometheus exposition.

pub fn reset(&mut self)

Reset all observations.

Trait Implementations

impl Clone for HistogramBuckets

fn clone(&self) -> HistogramBuckets

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HistogramBuckets

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.